Image signal transmitting/receiving apparatus and method

ABSTRACT

The present invention relates to an image signal transmitting/receiving apparatus and method for selectively performing transmission and display of a main image signal. The present invention transmits and display an sub-image signal instead of the received main image signal in case that the cut-off mode with respect to the main image signal has been set.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to an image communication terminal, and more particularly, to an image signal transmitting/receiving apparatus and method for selectively performing transmission and display of a main image signal.

[0003] 2. Description of the Background Art

[0004] Thanks to its handy portability and convenience in use, a mobile communication terminal is widely used. With its functions for phone book registration, memorandum and a days schedule, the mobile communication terminal is being developed to a means for managing personal information.

[0005]FIG. 1 illustrates an image signal transmitting and receiving apparatus having an image communication terminal (referred to as ‘terminal’, hereinafter) in accordance with a conventional art.

[0006] As shown in FIG. 1, the conventional image signal transmitting/receiving apparatus includes an image input unit 101 for inputting a main image signal, an encoder 102 for encoding the main image signal inputted through the image input unit 101, an image signal processor 103 for processing the encoded main image signal and transmitting it to a terminal of a receiving party, and processing the main image signal received from the terminal of the receiving party, a decoder 104 for decoding the main image signal received through the image signal processor 103, and an image signal display unit 105 for displaying the decoded main image signal on an LCD.

[0007] The operation of the conventional image signal transmitting and receiving apparatus constructed as described above will now be explained with reference to the accompanying drawings.

[0008] A main image signal inputted through the image signal input unit 101 is encoded by the encoder 102 and then inputted to the image signal processor 103. The image signal processor 103 processes the encoded main image signal and transmits it to the terminal of the receiving party, and processes the main image signal received from the terminal of the receiving party and outputs it to the decoder 104. The decoder 104 decodes the main image signal outputted from the image signal processor 103 and outputs it to the image signal display unit 105, so that the received main image signal is displayed on the LCD of the terminal.

[0009] While making an image communication by using the terminal, the user may not want to transmit the main image(his or her own image) to the other party, or display the image transmitted from the other party. At this time, the conventional terminal has shortcomings that the user should discontinue the telephone call in order to cut the main image to be transmitted or not to display the received image.

SUMMARY OF THE INVENTION

[0010] Therefore, an object of the present invention is to provide an image signal transmitting/receiving apparatus and method that is capable of selectively transmitting and displaying a main image signal.

[0011] To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided an image signal transmitting/receiving method including the steps of: inputting a first image signal; checking whether a cut-off mode has been set for the first image signal; and transmitting and displaying a second image signal instead of the first image signal if the cut-off mode is set for the first image signal.

[0012] To achieve the above object, there is further provided an image signal transmitting/receiving apparatus including: an image signal processor for processing a main image signal; a display unit for displaying the received main image signal; a controller for checking whether a cut-off mode has been set for the main image signal; and an image signal selector for selectively outputting a sub-image signal instead of the main image signal to the image signal processor or the display unit in case that the cut-off mode has been set.

[0013] The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

[0015] In the drawings:

[0016]FIG. 1 is a schematic block diagram of an image signal transmitting and receiving apparatus in accordance with a conventional art;

[0017]FIG. 2 is a schematic block diagram of an image signal transmitting and receiving apparatus in accordance with a preferred embodiment of the present invention;

[0018]FIG. 3 is a flow chart of a method for selectively transmitting a main image signal of FIG. 2 in accordance with the preferred embodiment of the present invention; and

[0019]FIG. 4 is a flow chart of a method for selectively displaying a main image signal of FIG. 2 in accordance with the preferred embodiment of the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

[0021] As shown in FIG. 2, an image signal transmitting/receiving apparatus of an image communication terminal (termed to as ‘terminal’, hereinafter) in accordance with a preferred embodiment of the present invention includes a storing unit 106 for storing a sub-image signal and an image signal selector 107 for selectively outputting a main image signal encoded by an encoder 102 or the sub-image signal stored in the image signal storing unit under the control of a controller (not shown), which are additional to the conventional image signal transmitting and receiving apparatus as shown in FIG. 1.

[0022] The operation of the image signal transmitting and receiving apparatus constructed as described above will now be explained with reference to FIGS. 2 to 4.

[0023] A user sets a cut-off mode for a main image signal to be transmitted and a received image signal by setting a menu of a terminal or a key inputting at the initial stage or during telephonic communication.

[0024] When the main image signal to be transmitted (referred to as a transmission image signal) is inputted (step S10), the main image signal is encoded by the encoder 102 (step S11). A controller (not shown) checks whether a cut-off mode has been set for the main image signal step S12). In case that the cut-off mode has been set, the controller controls the selector 107 so that a sub-image signal stored in the image signal storing unit 106 can be outputted to the image processor 103 (step S13).

[0025] At this time, as for the sub-image signal stored in the image signal storing unit 106, a predetermined image signal stored by the user or the main image signal previously transmitted through the image signal processor 103 can be repeatedly used.

[0026] Accordingly, as the image signal processor 103 processes the sub-image signal stored in the image signal storing unit 106 and transmits it, the user can cut off the main image from being transmitted to the other party during a telephonic communication.

[0027] Meanwhile, in case that the cut-off mode has not been set, the controller controls the image signal selector 107, so that the main image signal outputted from the encoder 102 can be outputted through the image signal processor 103 (step S14).

[0028] When a main image signal is received from the terminal of the other party (step S20), the controller checks whether the cut-off mode has been set for the main image signal (step S21).

[0029] In case that the cut-off mode has been set for the main image signal, the controller controls the image signal selector 107, so that the sub-image signal stored in the image signal storing unit 106 can be outputted to the decoder 102 (step S22).

[0030] Then, as the decoder 102 processes the sub-image signal stored in the image signal storing unit 106 and transmits it, the user can cut off the main image of the other party from being displayed during a telephonic communication (step S23).

[0031] Meanwhile, in case that the cut-off mode has not been set, the controller controls the image signal selector 107, so that the received main image signal can be outputted through the image signal processor 103 to the decoder 102 likewise in the conventional art (step S24).

[0032] As so far described, according to the image signal transmitting/receiving apparatus and method of the present invention, the main image signal can be selectively transmitted ad displayed. Thus, the user can transmit and display the main image signal as necessary without being interrupted during the telephonic communication.

[0033] As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalence of such meets and bounds are therefore intended to be embraced by the appended claims. 

What is claimed is:
 1. An image signal transmitting/receiving method comprising the steps of: transmitting/receiving a main image signal; checking whether a cut-off mode has been set for the main image signal; and transmitting and displaying a sub-image signal instead of the main image signal in case that the cut-off mode is set.
 2. The method of claim 1, wherein the main image signal is a signal to be transmitted or a received image signal.
 3. The method of claim 1, wherein the sub-image signal is a signal stored in a predetermined storing area.
 4. The method of claim 3, wherein the sub-image signal is a signal inputted by a user.
 5. The method of claim 3, wherein the sub-image signal is a previously transmitted main image signal.
 6. The method of claim 1, wherein the main image signal is transmitted and displayed in case that the cut-off mode has not been set.
 7. An image signal transmitting/receiving apparatus comprising: an image signal processor for processing a main image signal; a display unit for displaying the received main image signal; a controller for checking whether a cut-off mode has been set for the main image signal; and an image signal selector for selectively outputting a sub-image signal instead of the main image signal to the image signal processor or the display unit in case that the cut-off mode has been set.
 8. The apparatus of claim 7, wherein the sub-image signal is a signal stored by a user or the main image signal that has been previously transmitted.
 9. The apparatus of claim 7, wherein the image signal selector outputs the main image signal to the image signal processor in case that the cutoff mode has not been set.
 10. An image signal transmitting apparatus comprising: an image signal processor for processing a main image signal; a controller for checking whether a cut-off mode has been set for the main image signal; and an image signal selector for outputting a sub-image signal instead of the main image signal to the image signal processor in case that the cut-off mode has been set.
 11. The apparatus of claim 10, wherein the sub-image signal is a signal stored by a user or the main image signal that has been previously transmitted.
 12. The apparatus of claim 10, wherein the image signal selector outputs the main image signal to the image signal processor in case that the cutoff mode has not been set.
 13. An image signal receiving apparatus comprising: an image signal processor for processing a main image signal; a display unit for displaying the received main image signal; a controller for checking whether a cut-off mode has been set for the main image signal; and an image signal selector for outputting an sub-image signal instead of the received main image signal to the display unit in case that the cut-off mode has been set.
 14. The apparatus of claim 13, wherein the sub-image signal is a signal stored by a user or the main image signal which has been previously transmitted.
 15. The apparatus of claim 13, wherein the image signal selector outputs the received main image signal to the image signal display unit in case that the cut-off mode has not been set. 